Acoustic resonator



FIG. 1 is a front, left perspective view of an acoustic resonator;

FIG. 2 is a front, right perspective view of an acoustic resonator of FIG. 1;

FIG. 3 is a front elevational view of an acoustic resonator of FIG. 1;

FIG. 4 is a rear elevational view of an acoustic resonator of FIG. 1;

FIG. 5 is a right side elevational view of an acoustic resonator of FIG. 1;

FIG. 6 is a left side elevational view of an acoustic resonator of FIG. 1;

FIG. 7 is a top plan view of an acoustic resonator of FIG. 1; and,

FIG. 8 is a bottom plan view an acoustic resonator of FIG. 1. 

CLAIM The ornamental design for an acoustic resonator, as shown and described. 